The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 11, 2009
Filed:
Nov. 10, 2005
Satoshi Okutani, Ishikawa-gun, JP;
Tsuyoshi Uemura, Kanazawa, JP;
Hirofumi Kubota, Kanazawa, JP;
Naotada Okada, Yokohama, JP;
Junichi Tonotani, Yokohama, JP;
Keiji Suzuki, Yokohama, JP;
Hideki Ookawa, Yokohama, JP;
Satoshi Okutani, Ishikawa-gun, JP;
Tsuyoshi Uemura, Kanazawa, JP;
Hirofumi Kubota, Kanazawa, JP;
Naotada Okada, Yokohama, JP;
Junichi Tonotani, Yokohama, JP;
Keiji Suzuki, Yokohama, JP;
Hideki Ookawa, Yokohama, JP;
Toshiba Matsushita Display Technology Co., Ltd., Tokyo, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
An optical device includes a first waveguide layer in which multiple-beam interference occurs, a second waveguide layer which includes a back surface facing the first waveguide layer and a front surface as a light output surface, and a diffraction grating which is arranged on a back side of the second waveguide layer and faces the first waveguide layer, wherein a grating constant of the diffraction grating is defined such that a first-order diffracted light emerges from the second waveguide layer, the first-order diffracted light being generated when a light component having a highest intensity of light which propagates in an in-plane direction while causing multiple reflection in the first waveguide layer enters the diffraction grating.